<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <img src="./images/1.webp" alt="">
  <script>
    // 取到 N ~ M 的随机整数
    function getRandom(N,M) {
      return Math.floor(Math.random() * (M - N + 1)) + N
    }
    // 1. 获取图片对象
    const img = document.querySelector('img')
    // 2. 随机得到序号
    const random = getRandom(1,6)
    // 3. 更换路径
    img.src = `./images/${random}.webp`
  </script>
</body>
</html>